PEG-16 Soy Sterol
molecular structure · PubChem
AKA: Polyethylene Glycol 16 Soy Sterol
Allergen Warning
⚠️ Soy
Synthetic
Cleanser
Emulsifier
Not Clean
Sterols, soya (Glycine soja), ethoxylated (16 mol EO average molar ratio)
Functions
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Emulsifier
Mixes Oil & Water
Traditional Use
A synthetic ingredient combining polyethylene glycol with soy plant sterols. Developed in the late 20th century to provide plant-derived conditioning and skin barrier support in modern skincare formulations.
EWG
5
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
medical-approval
all-shades-safe
Regulatory Agencies
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed3 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: CosIng · EWG · CIR